I've searched the internet and checked other forums and now I'm hoping that someone will help me out here.

I'm on level 15 in Indiana Jones and the INfernal machine and I'm completely stuck. After going down the ladder into a room with an entry, I cannot get through the entry - tried jumping,. cliimbing and, heck, even tried to blow a hole using a bazooka but to no avail. Am I gone?! Any help would be appreciated.

There is unfortunately no fix for your problem. However, as a workaround you can use my savegames as others already did. Here is the level 15 start file which will help you to overcome the problem you encountered. However, more problems are about to follow. Use the savegames in this directory to overcome them as well. Once you have reached level 16, all should be ok again.